Quote:
Originally Posted by j1gzca
The concept of a brake booster is to keep a bladder in vacuum so that when the brake pedal is depressed, a check valve opens to let air in. This change in air pressure inside the bladder assists in pushing the piston in the master cylinder which then pushes the brake fluid into the individual brake calipers. So if you had a vacuum leak, the brake booster will somehow be affected.
That's how my dad explained it to me when I was a kid...  |
makes sense, now the question is, is it the same vacuum that closes/open the flapper?